Markus Haas, CEO of Telefónica Deutschland, pictured at the headquarters of mobile communications provider Telefónica (O2). The head of Munich-based mobile phone operator O2 sees his company on the ...

· New, free-to-download app lets users make and receive calls, texts and voicemail from their existing O2 number on any supported device · Calls are charged in line with a Pay Monthly tariff – with ...

UK carrier O2 has apparently fixed the loophole that exposed subscribers' mobile numbers to websites they visited using their handset's data connection, though there's still no official explanation as ...

O2 was tricked into transferring a phone number to fraudsters, a customer has fumed. ‘Sim-swap’ fraud has affected three readers – and dealing with their mobile phone company hasn’t been easy, ...

Luke Westaway is a senior editor at CNET and writer/ presenter of Adventures in Tech, a thrilling gadget show produced in our London office. Luke's focus is on keeping you in the loop with a mix of ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. O2 has come under fire as reports are coming through of the network sharing mobile numbers with ...